function get(url) {
	return new Promise(function (resolve, reject) {
		var req = new XMLHttpRequest();
		req.open('GET', url);

		req.onload = function onload() {
			if (req.status === 200) {
				resolve(req.response);
			} else {
				reject(Error(req.statusText));
			}
		};

		req.onerror = function onerror() {
			reject(Error('Network Error'));
		};

		req.send();
	});
}
function getJSON(url) {
	return get(url).then(JSON.parse);
}